nRF54L15DK System_OFF and System_ON with RAM retained current measurement

[Muhammed]

As per nRF54L15 datasheet, system_off current at 3V VDD is 0.8uA. I am getting negative average current when i measuring System_OFF current consumption of nRF54L15 using nRF54L15DK board (VDD=3V) as below.

But when configure vdd=1.8V using nRF board configurator i'm getting ~0.9uA. 

Application : ncs\v3.1.1\zephyr\samples\boards\nordic\system_off

modified the application by adding CONFIG_APP_USE_RETAINED_MEM=n  in prj.conf .

i have followed the current measurement application notes.

Could you please help me with this? is there any configuration i missed?

[Simonr]

Hi Muhammed

Can you also try disabling the VCOMs and external memory switches in the board configurator to make sure they're not backpowering device and are causing this negative current, as that's the only explanation to what could cause a negative curent.

Best regards,

Simon

[Muhammed]

Hi Simon, 
i tried with another board with same code and configuration as you told, its worked at 3V. And measured the current ~0.5uA as below.

But when i set to 3.3V, getting negative average current.

After disabling VCOMs and debugger, how to avoid this negative current? is it because of leakage current in the board as debugger is working at 2.6V?

Thanks,
muhammed